From b2a357bc1faf6e403f348f14e4eaf2687cbfaa6a Mon Sep 17 00:00:00 2001 From: Tom Jones Date: Tue, 30 Jan 2024 10:39:23 +0000 Subject: vlib: Add a skeleton pci interface for FreeBSD Implement a subset of the pci interface with unimplemented methods marked with a comment. This is enough functionality to allow dpdk to attach to pci devices and forward traffic on FreeBSD. Type: improvement Change-Id: I0d87778cd92ae332a6802c11083d3d99988678a1 Signed-off-by: Tom Jones --- src/vlib/freebsd/pci.c | 380 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 380 insertions(+) create mode 100644 src/vlib/freebsd/pci.c (limited to 'src/vlib') diff --git a/src/vlib/freebsd/pci.c b/src/vlib/freebsd/pci.c new file mode 100644 index 00000000000..a4e9eb2dda6 --- /dev/null +++ b/src/vlib/freebsd/pci.c @@ -0,0 +1,380 @@ +/* + * SPDX-License-Identifier: Apache-2.0 + * Copyright (c) 2024 Tom Jones + * + * This software was developed by Tom Jones under sponsorship + * from the FreeBSD Foundation. + * + */ + +#include +#include +#include + +#include +#include +#include +#include + +#include + +#include +#include +#include + +extern vlib_pci_main_t freebsd_pci_main; + +uword +vlib_pci_get_private_data (vlib_main_t *vm, vlib_pci_dev_handle_t h) +{ + return 0; +} + +void +vlib_pci_set_private_data (vlib_main_t *vm, vlib_pci_dev_handle_t h, + uword private_data) +{ +} + +vlib_pci_addr_t * +vlib_pci_get_addr (vlib_main_t *vm, vlib_pci_dev_handle_t h) +{ + return NULL; +} + +u32 +vlib_pci_get_numa_node (vlib_main_t *vm, vlib_pci_dev_handle_t h) +{ + return 0; +} + +u32 +vlib_pci_get_num_msix_interrupts (vlib_main_t *vm, vlib_pci_dev_handle_t h) +{ + return 0; +} + +/* Call to allocate/initialize the pci subsystem. + This is not an init function so that users can explicitly enable + pci only when it's needed. */ +clib_error_t *pci_bus_init (vlib_main_t *vm); + +vlib_pci_device_info_t * +vlib_pci_get_device_info (vlib_main_t *vm, vlib_pci_addr_t *addr, + clib_error_t **error) +{ + /* Populate a vlib_pci_device_info_t from the given address */ + clib_error_t *err = NULL; + vlib_pci_device_info_t *di = NULL; + + int fd = -1; + struct pci_conf_io pci; + struct pci_conf match; + struct pci_match_conf pattern; + bzero (&match, sizeof (match)); + bzero (&pattern, sizeof (pattern)); + + pattern.pc_sel.pc_domain = addr->domain; + pattern.pc_sel.pc_bus = addr->bus; + pattern.pc_sel.pc_dev = addr->slot; + pattern.pc_sel.pc_func = addr->function; + pattern.flags = PCI_GETCONF_MATCH_DOMAIN | PCI_GETCONF_MATCH_BUS | + PCI_GETCONF_MATCH_DEV | PCI_GETCONF_MATCH_FUNC; + + pci.pat_buf_len = sizeof (pattern); + pci.num_patterns = 1; + pci.patterns = &pattern; + pci.match_buf_len = sizeof (match); + pci.num_matches = 1; + pci.matches = &match; + pci.offset = 0; + pci.generation = 0; + pci.status = 0; + + fd = open ("/dev/pci", 0); + if (fd == -1) + { + err = clib_error_return_unix (0, "open '/dev/pci'"); + goto error; + } + + if (ioctl (fd, PCIOCGETCONF, &pci) == -1) + { + err = clib_error_return_unix (0, "reading PCIOCGETCONF"); + goto error; + } + + di = clib_mem_alloc (sizeof (vlib_pci_device_info_t)); + clib_memset (di, 0, sizeof (vlib_pci_device_info_t)); + + di->addr.as_u32 = addr->as_u32; + di->numa_node = 0; /* TODO: Place holder until we have NUMA on FreeBSD */ + + di->device_class = match.pc_class; + di->vendor_id = match.pc_vendor; + di->device_id = match.pc_device; + di->revision = match.pc_revid; + + di->product_name = NULL; + di->vpd_r = 0; + di->vpd_w = 0; + di->driver_name = format (0, "%s", &match.pd_name); + di->iommu_group = -1; + + goto done; + +error: + vlib_pci_free_device_info (di); + di = NULL; +done: + if (error) + *error = err; + close (fd); + return di; +} + +clib_error_t *__attribute__ ((weak)) +vlib_pci_get_device_root_bus (vlib_pci_addr_t *addr, vlib_pci_addr_t *root_bus) +{ + return NULL; +} + +clib_error_t * +vlib_pci_bind_to_uio (vlib_main_t *vm, vlib_pci_addr_t *addr, + char *uio_drv_name, int force) +{ + clib_error_t *error = 0; + + if (error) + { + return error; + } + + if (strncmp ("auto", uio_drv_name, 5) == 0) + { + /* TODO: We should confirm that nic_uio is loaded and return an error. */ + uio_drv_name = "nic_uio"; + } + return error; +} + +clib_error_t * +vlib_pci_register_intx_handler (vlib_main_t *vm, vlib_pci_dev_handle_t h, + pci_intx_handler_function_t *intx_handler) +{ + return NULL; +} + +clib_error_t * +vlib_pci_unregister_intx_handler (vlib_main_t *vm, vlib_pci_dev_handle_t h) +{ + return NULL; +} + +clib_error_t * +vlib_pci_register_msix_handler (vlib_main_t *vm, vlib_pci_dev_handle_t h, + u32 start, u32 count, + pci_msix_handler_function_t *msix_handler) +{ + return NULL; +} + +clib_error_t * +vlib_pci_unregister_msix_handler (vlib_main_t *vm, vlib_pci_dev_handle_t h, + u32 start, u32 count) +{ + return NULL; +} + +clib_error_t * +vlib_pci_enable_msix_irq (vlib_main_t *vm, vlib_pci_dev_handle_t h, u16 start, + u16 count) +{ + return NULL; +} + +uword +vlib_pci_get_msix_file_index (vlib_main_t *vm, vlib_pci_dev_handle_t h, + u16 index) +{ + return 0; +} + +clib_error_t * +vlib_pci_disable_msix_irq (vlib_main_t *vm, vlib_pci_dev_handle_t h, u16 start, + u16 count) +{ + return NULL; +} + +/* Configuration space read/write. */ +clib_error_t * +vlib_pci_read_write_config (vlib_main_t *vm, vlib_pci_dev_handle_t h, + vlib_read_or_write_t read_or_write, uword address, + void *data, u32 n_bytes) +{ + return NULL; +} + +clib_error_t * +vlib_pci_map_region (vlib_main_t *vm, vlib_pci_dev_handle_t h, u32 resource, + void **result) +{ + return NULL; +} + +clib_error_t * +vlib_pci_map_region_fixed (vlib_main_t *vm, vlib_pci_dev_handle_t h, + u32 resource, u8 *addr, void **result) +{ + return NULL; +} + +clib_error_t * +vlib_pci_io_region (vlib_main_t *vm, vlib_pci_dev_handle_t h, u32 resource) +{ + return NULL; +} + +clib_error_t * +vlib_pci_read_write_io (vlib_main_t *vm, vlib_pci_dev_handle_t h, + vlib_read_or_write_t read_or_write, uword offset, + void *data, u32 length) +{ + return NULL; +} + +clib_error_t * +vlib_pci_map_dma (vlib_main_t *vm, vlib_pci_dev_handle_t h, void *ptr) +{ + return NULL; +} + +int +vlib_pci_supports_virtual_addr_dma (vlib_main_t *vm, vlib_pci_dev_handle_t h) +{ + return 0; +} + +clib_error_t * +vlib_pci_device_open (vlib_main_t *vm, vlib_pci_addr_t *addr, + pci_device_id_t ids[], vlib_pci_dev_handle_t *handle) +{ + return NULL; +} + +void +vlib_pci_device_close (vlib_main_t *vm, vlib_pci_dev_handle_t h) +{ +} + +void +init_device_from_registered (vlib_main_t *vm, vlib_pci_device_info_t *di) +{ +} + +static int +pci_addr_cmp (void *v1, void *v2) +{ + vlib_pci_addr_t *a1 = v1; + vlib_pci_addr_t *a2 = v2; + + if (a1->domain > a2->domain) + return 1; + if (a1->domain < a2->domain) + return -1; + if (a1->bus > a2->bus) + return 1; + if (a1->bus < a2->bus) + return -1; + if (a1->slot > a2->slot) + return 1; + if (a1->slot < a2->slot) + return -1; + if (a1->function > a2->function) + return 1; + if (a1->function < a2->function) + return -1; + return 0; +} + +vlib_pci_addr_t * +vlib_pci_get_all_dev_addrs () +{ + vlib_pci_addr_t *addrs = 0; + + int fd = -1; + struct pci_conf_io pci; + struct pci_conf matches[32]; + bzero (matches, sizeof (matches)); + + pci.pat_buf_len = 0; + pci.num_patterns = 0; + pci.patterns = NULL; + pci.match_buf_len = sizeof (matches); + pci.num_matches = 32; + pci.matches = (struct pci_conf *) &matches; + pci.offset = 0; + pci.generation = 0; + pci.status = 0; + + fd = open ("/dev/pci", 0); + if (fd == -1) + { + clib_error_return_unix (0, "opening /dev/pci"); + return (NULL); + } + + if (ioctl (fd, PCIOCGETCONF, &pci) == -1) + { + clib_error_return_unix (0, "reading pci config"); + close (fd); + return (NULL); + } + + for (int i = 0; i < pci.num_matches; i++) + { + struct pci_conf *m = &pci.matches[i]; + vlib_pci_addr_t addr; + + addr.domain = m->pc_sel.pc_domain; + addr.bus = m->pc_sel.pc_bus; + addr.slot = m->pc_sel.pc_dev; + addr.function = m->pc_sel.pc_func; + + vec_add1 (addrs, addr); + } + + vec_sort_with_function (addrs, pci_addr_cmp); + close (fd); + + return addrs; +} + +clib_error_t * +freebsd_pci_init (vlib_main_t *vm) +{ + vlib_pci_main_t *pm = &pci_main; + vlib_pci_addr_t *addr = 0, *addrs; + + pm->vlib_main = vm; + + ASSERT (sizeof (vlib_pci_addr_t) == sizeof (u32)); + + addrs = vlib_pci_get_all_dev_addrs (); + vec_foreach (addr, addrs) + { + vlib_pci_device_info_t *d; + if ((d = vlib_pci_get_device_info (vm, addr, 0))) + { + init_device_from_registered (vm, d); + vlib_pci_free_device_info (d); + } + } + + return 0; +} + +VLIB_INIT_FUNCTION (freebsd_pci_init) = { + .runs_after = VLIB_INITS ("unix_input_init"), +}; -- cgit 1.2.3-korg